Improvement in burglar-alarms



1 aient (Milice To all whom u may concern 1 have invented anfI m proved lllectro-li'Iagnetic Burglary Figure 6, a partial vertical sect-ion of't'he same.

emily attached, by screw-tianches,

' tion,and the bell Bin a -able standard, b.

' from the magnet as to produce a proper vibration ot' proper influence ofthe magnets.

' I, and an `el JOHN, N. WELLS, or BROOKLYN,y NEW You K, ASSIGNOR T() HIMSELF Jour s. HULL,

-+4NI) JEROME B. BRYANT, 0F CINCINNATI, OHIO.

Letters Patent No. 94,929,

datal September 14, 1869.

Be it known that I',f J GHN N. WEIlLS, Brooklyn, in thel county of Kings, and Statejof New York,

Alarm; and I do hereby declare. that the followingr is a full amlcxact description thereof, reference being .had to the accompauj-'ingdrawings, making paltot' this specitication- Figure 1 heilig a front elevation of the alarm. j Figure 42, a plan of the same, the bell being removed,

to show the parts underneath. l

Figurc, a' partial central vertical section thereof, in a plane cutting tionr'-ont to b a-ck.

Figure 4 a view ofthe under side ofthe cap or cover of the hollow base or standen which the instrument rests.

Figure 5, an inside view of the base or stand, lookingfdowu upon the base or bottom thereof.

Figure 7, -a view showing th dow-attachment l'or the alarm'. Figure 8, a view showing the construction of a -doorattaclnnent for the alarm.

Like letters designate corresponding parts in all of e construction of a winthe figures. i

' The whole alarma l pparatus, including the bell ]3, magnets O (l, belt-hau nner D, armature E, key G, and their appendages, the imlica-ting-device, the terminations' of the sevelralwiresrand their connections, is mouuted'onand ina stand or base, A, which is gena a, to, the wall of the sleepinglroom, in.. a `convenient position for observation.,

ThemaguetsG C are supported in an'upright posipositioum'er them, by a snit-' The haunner-halulle d is located in i'ront ofthe magnet, and, together with the vibratory'arxn e, of the armature E,A under the magnets, forms a, right-angled or'bent lever, turning on pivotqmiiits, c c', in a bearing. block, f, substantially as represented. n. This lever is so constructed andl arranged that, wh'en the elect-ric current is passing through the magnetcoils, the armature E will be lii'tcd bythe magnet; but when the current ceases to tlow, the armature will drop by its own weight.

` When the circuit is broken, and Vthe its arm, c, o r a projection, g, thereon, rests on a spring seat, L, iig. 3, which requires to be adjusted' in position, so that `the armature will drop justas far, only,

armature drops,

thc bell-hammer, and keep the armature within the This I etiect by means otan elastic support or spring:

astio or spring-adjusting arm,V H,'the two hammer-lever or its a lContact with it, as indicated by red lines i1 The Schedule referred tu in, these ,Letters Patent and making paxt of the 'ama being situated beneath the base-top A, and so arranged that the free end ot one bears upon that of thc other, substantially as shown.

Au adjusting-screw, l, bears upon the spring-arm H, by turning which screw down, the arm H, and consequently the support I, are depressed, thus lowering the armature-seat L; but, on raising the. screw, the support I springs back by its own elasticity, and raises the armatuieseat.

The adjusting-screw l is located in a convenient position iu the front part of the base. c

A tightening-init, m., on the adjustilig-screw, serves to retain itin its position when properly adj usted. A -The adiusting-screwl or its female socket, p, the ami e ofthe armature, the spring-seat L, and its support I, form parts of the electric circuit which `passes through the magnet-coils, beginning at the wir(- u-, tig. 4.

and touches the seat- L, the circuitis closed, and the electric current renders the magnets attractive, and the armature E ,is raised thereby. This movementdisconnects the projection g from. the spring-seat- L, and breaks the circuit; and the magnets therel'nyceasing their action, the armature. drops and again closes the circuit. Thus, by the alternate automatic closing and breaking of the circuit at the springfscatLuthe bell is rung,r

The switch-key or circuit-connecter G, I have pivoted aronnd"tl|e screw-socket p.

The usual mode` of connecting the key-with the llmiturc-arln has been through its bea-rings and pivot-points, c c; but, since these pivots should be kept oiled, the oil is Aapt to stop theelectric current. l form the connection b va coiled wire, n, reaching from Hickey-bearing or socket p to the lever, as shownlin tig. 5.

(')necnd may bc clamped under holds the socket p ihplace.

This coiled wire will `yield to the motions of the lover, and not interfere therewith, and nevel' fails to keep the 4circuit complete. Anivor or other lion-comlucting tip, 1.', terminates thefadj us'ti 11g-screw l in this arrangement, in order that .the electric current may not pass directly to the parts H and I. v

'The other end, Ir, fig. 4, ot' the magnet-coil wire terminates at a screw-clamp, i, fromv which the returnwire extends to thebat-tcry. The metallic conmeetingpointor tip, hy .other pole of the battery connects with th projects upward through the base, at g, in s :tion that the key G may be readily swun the nut o, which which the, c magnets, I uch a posig round in rtig. 2, and

ytlwreby-t'orm the. circuit-connection, should the open- The moment the-farm e or its projection, g, drops l l ing ot' any window or door inv connection with the instrument, complete the circuit, this connection being made ahw-lys at night on retriu.

in the day time the key is turned o', as shown in black lilies inthe same. figure, that the alarm may not sound. 4

'lhe test-wire terminates at h, on the other side of the key, which is onlybrought in contact-therewith when it is desired to ascertain if the instrument is in working order.

1t connects, by the wire y, Iig. 4, with the clampscrew j, whence a wire extends to the battery.

The wires x a', from the several rooms which have separate connections with the instrument, as the kitchen, eellar, parlor, dining-room, flibrary, and hall, indicated in the drawings, all terminate inside ofthe base A, as shown in fig. 5; They-are, ofcourse, all insulated from each other andil'oin the key-connection g,-except.1.hrough the imlieating-device, which I construct and arrange substantially as follows:

l make the periphery u of the base A of metal or other conducting material, while the top and bottom are made oi' dry wood or other nou-conducting material. '.lhus its peripheral band may form pant. ot' the circuit; and it is connected with the key-poin t, figs. 4 and 5, or equivalent means.

Through this hand, in regular positions side by side, extend the shafts of the several indicating-lmobs M 1\I''corresponding in name and position with the roomwires a; a', the inner ends of the shafts being supported by another bearing, as shown,

When these knobs-are pushed in asfar as they can. go, their inner ends come in contact with the respective spring-clamps N' N, which secure the said wires 2: x in place, and thus the circuit is rendered complete through the metallic bami u,- but, when the knobv is drawn.

out, (as the one eonnectedwth the lib1ary-\vire, in tig.

5,) the circuit through that wire is broken.

Then the knobs are pushed in, they are held there bya notch., a', iig. 6, in the under side of each shaft; and, when vreleased thercti'om, the knobs are forced out. automatically lp' springs s s, on their respective shafts, as shown. Thus', on forcing in the knobs, (w hieh is to be done at; night, in setting the instrument tor action,) they are slight-ly depressed, and are then held in pince by their notches 'r lr; and, ou slightly raisingthe knobs, the springs act to force them out and break the connection. Hence, should an alarm he sounded, all that is required is to lil't the knobs M- M, successively, till the ringing stops, and t-he last knob sprung out indicates the room where the burglar is operating. p e v Since the simple bearing of the knob-shafts against the wire-clamps or connections Ni N will not insure a bright metallic surt'aee at the points of contact at all times, it' of corrosive metalJ tip the ends ot' the shafts and the surtires ot' the connections with platim1m,-as

at z, tig.'6. Other points and s nrthces of contact may be similarly protected.

t g by a wire,

7, consists ofa spring-plate, O, attached to the casing. at its lower end, where one wir, y, is connecten` with it, and another spring-plate, P, insulated ti'om the plate 0, and also attached to the casing at one end, wherethe other wire is attached to it.

4 \Vhen the window is down or closed, the free end' of the plate O springs away into a cam-shaped recess, Q, in the edge of thesash, and does not touch the plat/e P; but when the window is raised, the. cam-shaped bottom of the recess Q forces the plate O back till its upper e'nd, which bends outward, touches the plate P, land c'loses theY circuit, whereby the alarm is sounded.

For the upper 'sash the positions of these plates are reversed, heilig then attached to thel casing at their upper ends; and the cam-recess Q, in the sash, acts in the other direction.

The improved doorfattachmcnt, as shown in g. 8, has a sliding-bolt, It, in a suitable bracket 'or ease, at

one wire, is connected. It bears one connecting-plate, S, while a spring-plate, T, insulated thereti'ou'i, is attached Y to the door-jamb with the other wire, y. I

The bolt It is forcedout, so as to project beyond its bracket; and form the connect-ion between the plates S and T, by a coiled spring, when the door is opened a very little; but when the'door is closed, it pushes in the bolt lt, and keeps the circuit broken.

. Both of theseattachments make a strong, secure, and never-failing connection, and are notuliable to get out of order.

byLet-ters Patent, is- 1. The adjustable spring-seat L, for the armature E, substantially as herein specited.

I,-arm H, screw I, andof the key G, in connection therewith, as setforth.

3. Also, the coiled-wire n, to connect the key with the hammer and armaturedever, for the purpose speciiied. v

4. Also, making the peripheral band u ot the base A, part ot'tlie `circuit, as herein specified.

5. Also, the construction and arrangement of the imlicating-knobsM M, with notched'shafts'or equivalent thereot', the springs s s, andspring-clamp connections N N, together constituting the imlicating-device, substantially as herein specified.

6; Also, placing the indicator upon, or attaching it to the' same base A that supports the magnets and hell.

a The above specification of my improved burglaralarn'i signed by me, this 11th day ot' February, 1869.

JOHN N. 1WELLS.

v Witnesses: I

1'). H. WVINCHESTER, J ons SKULL.

The improved window-attachment, as shown in fig. y

taehed to the door-jamb, with which bolt or its case What I claim as my invention, and desire to secure 2. Aiso, the arrangement of thel adjusting-support n 

